Security Mistakes
Learning Objectives
- Recognize high-risk security mistakes in code.
- Apply practical prevention techniques.
- Build safer defaults in everyday development.
High-Risk Mistakes
- Trusting unvalidated user input.
- Building SQL with string concatenation.
- Hardcoding passwords or tokens.
- Missing authorization checks.
Prevention Basics
- Validate and sanitize input.
- Use parameterized queries.
- Store secrets in environment/config managers.
- Enforce server-side access control.
Practice Tasks
- Replace one raw SQL query with parameterized SQL.
- Remove hardcoded secrets from sample code.
- Add validation for all user-provided fields.
Summary
Most security bugs are avoidable with safe defaults.